| OCR Text |
Show 1-33 rado River plateau remain . Each gully , wash , and canyon , is mute evidence of erosion and topographic features of all grades show the influence of aridity . Besides the material brought into the river by side tributaries or blown in by the wind ( Photo Exhibit 20 ) , the ( river's rivers ) own powers of erosion are a source of sediment supply caused by gradually wearing away their rock walls or undermining their banks . As a result of these conditions the Colorado River system carries more suspended matter per square mile of drainage area than any other river in the United States . ( Denudation by R . B . Doyle and H . . Stabler , pages 78 to 93 , U . S . Water Supply Paper No . 234 , Government Printing Office , 1909 . ) Green River ( -According According ) to Fortier and Blaney ( Compl . Exhibit 68 , page 17 ) as digested by Hoyt ( Compl . Exhibit 75 , pages 76 , 77 ) , the amount of silt carried past Green River in suspension during the ( 12-month 12month ) period August , ( 1914 19,14 ) , to July , 1915 , was 8,332,900 tons . This is exclusive of sediment brought in by Saleratus ( Wash NATash ) and San Rafael River and ( in- in ) cludes no bed load . C . S . Howard ( Abs . R . vol . 2 , p . 974 ) , based on much more complete information than was available to Fortier and Blaney , estimates that during the period October 1 , 1928 , to September 30 , 1929 , the Green River carried 50,700,000 tons of sediment in suspension . Colorado River near Moab . ( -According According ) to Fortier and Blaney ( Compl . Exhibit 68 , page 17 ) , as digested by Hoyt ( Compl . Exhibit 75 , page 77 ) , the amount 35623--31-10 |
